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1. • CommentRowNumber1.
   • CommentAuthorUrs
   • CommentTimeFeb 15th 2013
   • (edited Feb 15th 2013)
   • PermaLink
   Author: Urs
   Format: MarkdownItexWe had noticed that recently with some entry, and now I notice it again with the entry _[[Newton's constant]]_ (try _[[gravitational constant]]_ if the former link does not work): putting an apostrophe into an entry title leads, since a while ago, to weird behaviour. I am not sure how to nail it down. First of all the apostrophe does not appear in the actual title, but its unicode-code does. Nevertheless, at first, writing the title with apostrophy in text leads to a working link. But then later that link breaks, too, it seems, for reasons which I couldn't identify yet. Trying to rename the entry seems to make everything worse. I should probably try to give a more systematic bug report. I'll see if I find the time to do more experimenting...

   We had noticed that recently with some entry, and now I notice it again with the entry Newton’s constant (try gravitational constant if the former link does not work):

   putting an apostrophe into an entry title leads, since a while ago, to weird behaviour. I am not sure how to nail it down. First of all the apostrophe does not appear in the actual title, but its unicode-code does. Nevertheless, at first, writing the title with apostrophy in text leads to a working link. But then later that link breaks, too, it seems, for reasons which I couldn’t identify yet. Trying to rename the entry seems to make everything worse.

   I should probably try to give a more systematic bug report. I’ll see if I find the time to do more experimenting…

2. • CommentRowNumber2.
   • CommentAuthorTobyBartels
   • CommentTimeFeb 15th 2013
   • PermaLink
   Author: TobyBartels
   Format: MarkdownItexI\'ve never noticed problems with this, but I see that the redirect at [[gravitational constant]] is for [[Newton's constant]] instead of for [[Newton's constant]]. Fixing that fixes the link in your post here. The nForum does some fancier processing that *can* break links a bit; you can see from the source of this comment how I had to get around them here. I usually add extra redirects for apostrophes to catch some of the possibilities, but it never occurred to me to add anything like `'`!

   I've never noticed problems with this, but I see that the redirect at gravitational constant is for Newton's constant instead of for Newton's constant. Fixing that fixes the link in your post here.

   The nForum does some fancier processing that can break links a bit; you can see from the source of this comment how I had to get around them here. I usually add extra redirects for apostrophes to catch some of the possibilities, but it never occurred to me to add anything like '!

3. • CommentRowNumber3.
   • CommentAuthorUrs
   • CommentTimeFeb 15th 2013
   • (edited Feb 15th 2013)
   • PermaLink
   Author: Urs
   Format: MarkdownItexWe had the same king od issue recently with [[Segal's category]], discussed [here](http://nforum.mathforge.org/discussion/4748/segals-category/#Item_1). That the redirect contains that unicode-code is part of the problem. This is a remnant of the original page title, which was "Newton's constant", coming out wrong. I didn't add that funny redirect. I only created "Newton's constant" and then renamed it to "gravitational constant" when the links to it didn't work. Best, to see what's going on, is if you create yourself an entry with an apostrophy in the name and see what happens. Try [[Sand's Box]] or something.

   We had the same king od issue recently with Segal’s category, discussed here.

   That the redirect contains that unicode-code is part of the problem. This is a remnant of the original page title, which was “Newton’s constant”, coming out wrong. I didn’t add that funny redirect. I only created “Newton’s constant” and then renamed it to “gravitational constant” when the links to it didn’t work.

   Best, to see what’s going on, is if you create yourself an entry with an apostrophy in the name and see what happens. Try Sand’s Box or something.

4. • CommentRowNumber4.
   • CommentAuthorTobyBartels
   • CommentTimeFeb 15th 2013
   • PermaLink
   Author: TobyBartels
   Format: MarkdownItexWow! I\'m sure that these things *used* to work. But this time, I created [[Sand's Box]], then when I edited it, suddenly it had become [[Sand's Box]] instead. If I rename it back to the apostrophe, then a redirect to the fancy name (which worked as a straight link) doesn\'t work; and then if I edit it again, then it goes back to the fancy name. This is definitely a bug!

   Wow!

   I'm sure that these things used to work. But this time, I created Sand's Box, then when I edited it, suddenly it had become Sand's Box instead. If I rename it back to the apostrophe, then a redirect to the fancy name (which worked as a straight link) doesn't work; and then if I edit it again, then it goes back to the fancy name.

   This is definitely a bug!

5. • CommentRowNumber5.
   • CommentAuthorUrs
   • CommentTimeFeb 15th 2013
   • PermaLink
   Author: Urs
   Format: MarkdownItexYup, that's it!

   Yup, that’s it!

6. • CommentRowNumber6.
   • CommentAuthorTim_Porter
   • CommentTimeFeb 16th 2013
   • PermaLink
   Author: Tim_Porter
   Format: MarkdownItexCheck [[Dowker's theorem]]. That seemed to be working, but I did not try to edit it.

   Check Dowker’s theorem. That seemed to be working, but I did not try to edit it.

7. • CommentRowNumber7.
   • CommentAuthorUrs
   • CommentTimeFeb 16th 2013
   • PermaLink
   Author: Urs
   Format: MarkdownItexThe bug didn't exist a while back, and so I guess all the pages with apostrophes that were created before this bug here was introduced are unaffected.

   The bug didn’t exist a while back, and so I guess all the pages with apostrophes that were created before this bug here was introduced are unaffected.

8. • CommentRowNumber8.
   • CommentAuthorTim_Porter
   • CommentTimeFeb 16th 2013
   • PermaLink
   Author: Tim_Porter
   Format: MarkdownItexThat is my guess as well. That confirms that it is a bug due to updates of the system, I suppose.

   That is my guess as well. That confirms that it is a bug due to updates of the system, I suppose.

9. • CommentRowNumber9.
   • CommentAuthorTobyBartels
   • CommentTimeFeb 17th 2013
   • PermaLink
   Author: TobyBartels
   Format: MarkdownItexI just edited [[Dowker's theorem|Dowker\'s theorem]], and that broke it; then I explicitly changed its name, and that fixed it. Work-around: Whenever you edit a page with an apostrophe in the title, click to change its name. You\'ll find that it already has the broken name, which you will then change back to the correct one.

   I just edited Dowker's theorem, and that broke it; then I explicitly changed its name, and that fixed it.

   Work-around: Whenever you edit a page with an apostrophe in the title, click to change its name. You'll find that it already has the broken name, which you will then change back to the correct one.

10. • CommentRowNumber10.
    • CommentAuthorTim_Porter
    • CommentTimeFeb 17th 2013
    • PermaLink
    Author: Tim_Porter
    Format: MarkdownItexDid you try that on the other instances of apostrophes?

    Did you try that on the other instances of apostrophes?

11. • CommentRowNumber11.
    • CommentAuthorTobyBartels
    • CommentTimeFeb 18th 2013
    • PermaLink
    Author: TobyBartels
    Format: MarkdownItexIf you mean the work-around, I\'ve tried it on [[Segal's category|Segal\'s category]] and on [[Dowker's theorem|Dowker\'s theorem]]. There are dozens of pages with `'` in the title[^1] if you want to try more. If you mean if I fixed all of the pages with `'` in the title, then I did. [^1]: * [[Baer's criterion]] * [[Baez's law]] * [[Barr's theorem]] * [[Bell's theorem]] * [[Berger's theorem]] * [[Berry's phase]] * [[Bertrand's theorem]] * [[Birkhoff's theorem]] * [[Boman's theorem]] * [[Borel's theorem]] * [[Borsuk's shape theory]] * [[Burali-Forti's paradox]] * [[Cantor's paradox]] * [[Cantor's theorem]] * [[Cartan's homotopy formula]] * [[Cauchy's integral theorem]] * [[Cauchy's theorem (group theory)]] * [[D'Auria-Fre formulation of supergravity]] * [[Darboux's theorem]] * [[Day's reflection theorem]] * [[Diaconescu's theorem]] * [[Dowker's theorem]] * [[Drinfel'd double]] * [[Drinfel'd twist]] * [[Drinfel'd-Sokolov reduction]] * [[Ehresmann's theorem]] * [[Eric D'Hoker]] * [[Esquisse d'un programme]] * [[Fadell's configuration space]] * [[Fell's theorem]] * [[Gelfond's theorem]] * [[Giraud's theorem]] * [[Gleason's theorem]] * [[Grothendieck's Galois theory]] * [[Haag's theorem]] * [[Hadamard's formula]] * [[Hadwiger's theorem]] * [[Hartog's number]] * [[Help me! I'm trying to understand Bakalov and Kirillov]] * [[Hilbert's Theorem 90]] * [[Hilbert's basis theorem]] * [[Hilbert's fifth problem]] * [[Hofer's geometry]] * [[Johnstone's topological topos]] * [[Kadeishvili's theorem]] * [[Kapranov's noncommutative geometry]] * [[Kirchhoff's laws]] * [[Kleene's second algebra]] * [[Kriegl and Michor's cartesian closed category of manifolds]] * [[Kuiper's theorem]] * [[Lack's coherence theorem]] * [[Lawvere's reconstruction theorem]] * [[Lazard's criterion]] * [[Lie's three theorems]] * [[Mac Lane's proof of the coherence theorem for monoidal categories]] * [[Mal'cev category]] * [[Mal'cev completion]] * [[Mal'cev variety]] * [[Markov's principle]] * [[Maschke's theorem]] * [[Maxwell's equations]] * [[Michael's theorem]] * [[Milnor's conjecture]] * [[Mochizuki's proof of abc]] * [[Mostowski's collapsing lemma]] * [[Mumford's conjecture]] * [[Nakayama's lemma]] * [[Newton's method]] * [[Noether's theorem]] * [[Nori's Tannakian theorem]] * [[Ostrowski's theorem]] * [[Peirce's law]] * [[Peirce's logic of information]] * [[Planck's constant]] * [[Riccardo D'Auria]] * [[Rouquier's cocovering]] * [[Russell's paradox]] * [[Sand's Box]] * [[Schneider's theorem]] * [[Schur's lemma]] * [[Simpson's conjecture]] * [[Skolem's paradox]] * [[Strøm's theorem]] * [[Szpiro's conjecture]] * [[T. Streicher - a model of type theory in simplicial sets - a brief introduction to Voevodsky' s homotopy type theory]] * [[Thom's transversality theorem]] * [[Thompson's group F]] * [[Trimble's notion of weak n-category > history]] * [[Verdier's abelianization functor]] * [[Vladimir Drinfel'd]] * [[Vojta's conjecture]] * [[Vopěnka's principle]] * [[Wick's lemma]] * [[Zorn's lemma]] * [[affine Serre's theorem]] * [[child's drawing]]

    If you mean the work-around, I've tried it on Segal's category and on Dowker's theorem. There are dozens of pages with ' in the title¹ if you want to try more. If you mean if I fixed all of the pages with ' in the title, then I did.

    ---

    1. • Baer’s criterion
       • Baez’s law
       • Barr’s theorem
       • Bell’s theorem
       • Berger’s theorem
       • Berry’s phase
       • Bertrand’s theorem
       • Birkhoff’s theorem
       • Boman’s theorem
       • Borel’s theorem
       • Borsuk’s shape theory
       • Burali-Forti’s paradox
       • Cantor’s paradox
       • Cantor’s theorem
       • Cartan’s homotopy formula
       • Cauchy’s integral theorem
       • Cauchy’s theorem (group theory)
       • D’Auria-Fre formulation of supergravity
       • Darboux’s theorem
       • Day’s reflection theorem
       • Diaconescu’s theorem
       • Dowker’s theorem
       • Drinfel’d double
       • Drinfel’d twist
       • Drinfel’d-Sokolov reduction
       • Ehresmann’s theorem
       • Eric D’Hoker
       • Esquisse d’un programme
       • Fadell’s configuration space
       • Fell’s theorem
       • Gelfond’s theorem
       • Giraud’s theorem
       • Gleason’s theorem
       • Grothendieck’s Galois theory
       • Haag’s theorem
       • Hadamard’s formula
       • Hadwiger’s theorem
       • Hartog’s number
       • Help me! I’m trying to understand Bakalov and Kirillov
       • Hilbert’s Theorem 90
       • Hilbert’s basis theorem
       • Hilbert’s fifth problem
       • Hofer’s geometry
       • Johnstone’s topological topos
       • Kadeishvili’s theorem
       • Kapranov’s noncommutative geometry
       • Kirchhoff’s laws
       • Kleene’s second algebra
       • Kriegl and Michor’s cartesian closed category of manifolds
       • Kuiper’s theorem
       • Lack’s coherence theorem
       • Lawvere’s reconstruction theorem
       • Lazard’s criterion
       • Lie’s three theorems
       • Mac Lane’s proof of the coherence theorem for monoidal categories
       • Mal’cev category
       • Mal’cev completion
       • Mal’cev variety
       • Markov’s principle
       • Maschke’s theorem
       • Maxwell’s equations
       • Michael’s theorem
       • Milnor’s conjecture
       • Mochizuki’s proof of abc
       • Mostowski’s collapsing lemma
       • Mumford’s conjecture
       • Nakayama’s lemma
       • Newton’s method
       • Noether’s theorem
       • Nori’s Tannakian theorem
       • Ostrowski’s theorem
       • Peirce’s law
       • Peirce’s logic of information
       • Planck’s constant
       • Riccardo D’Auria
       • Rouquier’s cocovering
       • Russell’s paradox
       • Sand’s Box
       • Schneider’s theorem
       • Schur’s lemma
       • Simpson’s conjecture
       • Skolem’s paradox
       • Strøm’s theorem
       • Szpiro’s conjecture
       • T. Streicher - a model of type theory in simplicial sets - a brief introduction to Voevodsky’ s homotopy type theory
       • Thom’s transversality theorem
       • Thompson’s group F
       • Trimble’s notion of weak n-category > history
       • Verdier’s abelianization functor
       • Vladimir Drinfel’d
       • Vojta’s conjecture
       • Vopěnka’s principle
       • Wick’s lemma
       • Zorn’s lemma
       • affine Serre’s theorem
       • child’s drawing

       ↩

12. • CommentRowNumber12.
    • CommentAuthorAndrew Stacey
    • CommentTimeFeb 18th 2013
    • PermaLink
    Author: Andrew Stacey
    Format: MarkdownItexI've raised this with Jacques.

    I’ve raised this with Jacques.

13. • CommentRowNumber13.
    • CommentAuthorTobyBartels
    • CommentTimeFeb 18th 2013
    • PermaLink
    Author: TobyBartels
    Format: MarkdownItexI\'ve now had occasion to edit [[child's drawing|child\'s drawing]] (only minor edits) using the work-around in #9, and that went fine.

    I've now had occasion to edit child's drawing (only minor edits) using the work-around in #9, and that went fine.

14. • CommentRowNumber14.
    • CommentAuthorUrs
    • CommentTimeMar 2nd 2013
    • (edited Mar 2nd 2013)
    • PermaLink
    Author: Urs
    Format: MarkdownItexI had added an Idea-sentence to the old entry [[Simpson's conjecture]]. The apostrophe-bug then screwed up the page title. So I renamed the page again by hand. Now the cache-bug prevents the edit to be shown. I logged into the server and tried to clear the cache. But I suppose to do so I have to enter the apostrophes by some code again. I suppose I could figure out how to do that, but I don't have further time for this now.

    I had added an Idea-sentence to the old entry Simpson’s conjecture. The apostrophe-bug then screwed up the page title. So I renamed the page again by hand. Now the cache-bug prevents the edit to be shown.

    I logged into the server and tried to clear the cache. But I suppose to do so I have to enter the apostrophes by some code again. I suppose I could figure out how to do that, but I don’t have further time for this now.

15. • CommentRowNumber15.
    • CommentAuthorTobyBartels
    • CommentTimeMar 3rd 2013
    • PermaLink
    Author: TobyBartels
    Format: MarkdownItexStart to clear the cache, and when you get up to the point that you\'re typing in the name of the page, type only up to `Simpson`. Now type `*`. Then hit return. This may clear more caches than necessary, but there\'s nothing wrong with that.

    Start to clear the cache, and when you get up to the point that you're typing in the name of the page, type only up to Simpson. Now type *. Then hit return. This may clear more caches than necessary, but there's nothing wrong with that.

16. • CommentRowNumber16.
    • CommentAuthorTobyBartels
    • CommentTimeMar 3rd 2013
    • PermaLink
    Author: TobyBartels
    Format: MarkdownItexAnother way to clear the cache in this particular situation (where there is a page at the name whose cache must be cleared) is to edit the page again (making sure to do the workaround at the same time: rename the page back to the correct name while you edit).

    Another way to clear the cache in this particular situation (where there is a page at the name whose cache must be cleared) is to edit the page again (making sure to do the workaround at the same time: rename the page back to the correct name while you edit).

17. • CommentRowNumber17.
    • CommentAuthorUrs
    • CommentTimeMar 3rd 2013
    • PermaLink
    Author: Urs
    Format: MarkdownItexYes, I tried the wildcard, but with no effect. Probably I would have had to escape it once more to flow through the script or something. I am sure with a bit more fiddling I could do it. Maybe one day I find the time.

    Yes, I tried the wildcard, but with no effect. Probably I would have had to escape it once more to flow through the script or something.

    I am sure with a bit more fiddling I could do it. Maybe one day I find the time.

18. • CommentRowNumber18.
    • CommentAuthorTobyBartels
    • CommentTimeMar 20th 2013
    • PermaLink
    Author: TobyBartels
    Format: MarkdownItexHas this bug been fixed? I\'m no longer getting it on, for example, [[Segal's category]] (although I was getting it last night!).

    Has this bug been fixed? I'm no longer getting it on, for example, Segal’s category (although I was getting it last night!).

19. • CommentRowNumber19.
    • CommentAuthorAndrew Stacey
    • CommentTimeMar 20th 2013
    • PermaLink
    Author: Andrew Stacey
    Format: MarkdownItexI reported it to Jacques a little while ago but he asked for more details which I didn't see until today so I provided those details (and in so doing verified that it still exists). But since I originally reported it then there's been an update to instiki which I've only just applied so there's a possibility that it was fixed in the meantime. ... I've just gone through the steps I used to verify the bug on [[doriath:HomePage]] and the bug no longer appears. It would seem that Jacques has fixed it.

    I reported it to Jacques a little while ago but he asked for more details which I didn’t see until today so I provided those details (and in so doing verified that it still exists). But since I originally reported it then there’s been an update to instiki which I’ve only just applied so there’s a possibility that it was fixed in the meantime.

    …

    I’ve just gone through the steps I used to verify the bug on HomePage (doriath) and the bug no longer appears. It would seem that Jacques has fixed it.

20. • CommentRowNumber20.
    • CommentAuthorTobyBartels
    • CommentTimeMar 20th 2013
    • PermaLink
    Author: TobyBartels
    Format: MarkdownItex(^_^)

    (^_^)

21. • CommentRowNumber21.
    • CommentAuthorUrs
    • CommentTimeMar 20th 2013
    • PermaLink
    Author: Urs
    Format: MarkdownItexHas the cache bug ever been reported? Is this a more subtle issue to solve?

    Has the cache bug ever been reported? Is this a more subtle issue to solve?